A proposal on transgenerationality: the absolute. This article develops some ideas about transgenerationality. The absolute designates certain representations over-invested by affections which tend to deter the associative chain, leading to difficulties in the psychic change. It reveals past traumas transmitted from parents to their children, coming from an archaic lineage. The analysis of a couple provides the clinic material for some considerations about it. In its clinical origins and its theoretical and clinical development, this hypothetical construct, originated in a clinical experience, is related to several psychoanalytical concepts. It has been useful to understand the hard suffering of some of the author's patients severely traumatized in their families.